Whit, if you be still around ...
MANY hours and more than I EVER wanted to know about IGES later: I
isolated a (my) problem with the combination of Rhino export and
FEMAP v8.0 import. It's choking on geometry parameterizations. Rhino
will parameterize a 1" diameter trim curve domain -pi to 0, for
instance. FEMAP wants to see 0 to 1 parameterization for curve and
entity definition spaces. I imagine Rhino's parameterization is
perfectly legit and the real "CAD" programs I've tried don't seem to
care. You can check ALGOR (FemPro?) with the attached test files
(simple plane surface with a hole trimmed in the middle) to see if it
has similar problems. Might be useful info for a someday application
if nothing else. Looking at your "example assembly.igs"; it does not
look like that should be a problem with IV exports but I'd have to
dig some more before placing a bet.
If you want to pursue the issue duplicate the attached test file
using IV, export and post the export if ALGOR has a problem with it.
I'll take a look at it when I have time and see what happens if I
shake it around a little. If you have no problem with that test you
might try duplicating your normal workflow, i.e. exporting from an
assembly, using a similarly simple geometry definition. You might be
looking at transformation matrix or subfigure definition (ahv larned
a bunch o big new words the past week, still need to figer out what
they mean) problems. Getting a copy of problem data sets to ALGOR is
advisable, too, if you have the means. They need something to do in
addition to repainting the buttons for the next release.
Lastly, if you haven't tried it; "washing" thru and exporting from
Acad/MDT for FEA import has worked relatively well for me in the
past. I think the flat data structures, everything referencing a
single coord sys, yadadada, simplifies both write and read
transactions. I would clean out any extraneous data (solid surfs /
faces, block definitions, etc.), segregate surface functional groups
by layer and color, purge the file, etc. before exporting. Might be
worth testing a couple of data sets. Things you need to watch...
Insanely tight export tolerance Acad will write out. It will cause
failures if ALGOR tries to use a GP19 specified value like 1e-8 inch.
Sane values are in the .001", .01 mm range. It there's no user
accessible setting for import or export the value can be changed in
the IGES file. Freezing layers is suspect. I'd go for a clean file
and all layers On.